#!/usr/bin/env python3
# Copyright (C) 2015 Savoir-Faire Linux Inc.
# Author: Adrien Béraud <adrien.beraud@savoirfairelinux.com>
import sys, subprocess, argparse, time, random, string, threading, signal
from pyroute2.netns.process.proxy import NSPopen
import numpy as np
import matplotlib.pyplot as plt
from dhtnetwork import DhtNetwork
sys.path.append('..')
from opendht import *
class WorkBench():
"""docstring for WorkBench"""
def __init__(self, ifname='ethdht', virtual_locs=8, node_num=32, remote_bootstrap=None, loss=0, delay=0, disable_ipv4=False,
disable_ipv6=False):
self.ifname = ifname
self.virtual_locs = virtual_locs
self.node_num = node_num
self.clusters = min(virtual_locs, node_num)
self.node_per_loc = int(self.node_num / self.clusters)
self.loss = loss
self.delay = delay
self.disable_ipv4 = disable_ipv4
self.disable_ipv6 = disable_ipv6
self.remote_bootstrap = remote_bootstrap
self.local_bootstrap = None
self.procs = [None for _ in range(self.clusters)]
def get_bootstrap(self):
if not self.local_bootstrap:
self.local_bootstrap = DhtNetwork(iface='br'+self.ifname,
first_bootstrap=False if self.remote_bootstrap else True,
bootstrap=[(self.remote_bootstrap, "5000")] if self.remote_bootstrap else [])
return self.local_bootstrap
def create_virtual_net(self):
if self.virtual_locs > 1:
cmd = ["python3", "virtual_network_builder.py", "-i", self.ifname, "-n", str(self.clusters), '-l', str(self.loss), '-d', str(self.delay)]
if not self.disable_ipv4:
cmd.append('-4')
if not self.disable_ipv6:
cmd.append('-6')
print(cmd)
p = subprocess.Popen(cmd, stdout=subprocess.PIPE)
output, err = p.communicate()
print(output.decode())
def destroy_virtual_net(self):
print('Shuting down the virtual IP network.')
subprocess.call(["python3", "virtual_network_builder.py", "-i", self.ifname, "-n", str(self.clusters), "-r"])
def start_cluster(self, i):
if self.local_bootstrap:
cmd = ["python3", "dhtnetwork.py", "-n", str(self.node_per_loc), '-I', self.ifname+str(i)+'.1']
if self.remote_bootstrap:
cmd.extend(['-b', self.remote_bootstrap, '-bp', "5000"])
else:
if not self.disable_ipv4 and self.local_bootstrap.ip4:
cmd.extend(['-b', self.local_bootstrap.ip4])
if not self.disable_ipv6 and self.local_bootstrap.ip6:
cmd.extend(['-b6', self.local_bootstrap.ip6])
self.procs[i] = NSPopen('node'+str(i), cmd)
else:
raise Exception('First create bootstrap.')
def stop_cluster(self, i):
if self.procs[i]:
try:
self.procs[i].send_signal(signal.SIGINT);
self.procs[i].wait()
self.procs[i].release()
except Exception as e:
print(e)
self.procs[i] = None
def replace_cluster(self):
n = random.randrange(0, self.clusters)
self.stop_cluster(n)
self.start_cluster(n)
def getsTimesTest():
"""TODO: Docstring for
"""
plt.ion()
fig, axes = plt.subplots(2, 1)
fig.tight_layout()
lax = axes[0]
hax = axes[1]
lines = None#ax.plot([])
#plt.ylabel('time (s)')
hax.set_ylim(0, 2)
# let the network stabilise
plt.pause(60)
#start = time.time()
times = []
done = 0
lock = threading.Condition()
def getcb(v):
print("found", v)
return True
def donecb(ok, nodes):
nonlocal lock, done, times
t = time.time()-start
with lock:
if not ok:
print("failed !")
times.append(t)
done -= 1
lock.notify()
def update_plot():
nonlocal lines
while lines:
l = lines.pop()
l.remove()
del l
lines = plt.plot(times, color='blue')
plt.draw()
def run_get():
nonlocal done
done += 1
start = time.time()
bootstrap.front().get(InfoHash.getRandom(), getcb, lambda ok, nodes: donecb(ok, nodes, start))
plt.pause(5)
plt.show()
update_plot()
times = []
for n in range(10):
wb.replace_cluster()
plt.pause(2)
print("Getting 50 random hashes succesively.")
for i in range(50):
with lock:
done += 1
start = time.time()
bootstrap.front().get(InfoHash.getRandom(), getcb, donecb)
while done > 0:
lock.wait()
update_plot()
update_plot()
print("Took", np.sum(times), "mean", np.mean(times), "std", np.std(times), "min", np.min(times), "max", np.max(times))
print('GET calls timings benchmark test : DONE. ' \
'Close Matplotlib window for terminating the program.')
plt.ioff()
plt.show()
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='Run, test and benchmark a DHT network on a local virtual network with simulated packet loss and latency.')
parser.add_argument('-i', '--ifname', help='interface name', default='ethdht')
parser.add_argument('-n', '--node-num', help='number of dht nodes to run', type=int, default=32)
parser.add_argument('-v', '--virtual-locs', help='number of virtual locations (node clusters)', type=int, default=8)
parser.add_argument('-l', '--loss', help='simulated cluster packet loss (percent)', type=int, default=0)
parser.add_argument('-d', '--delay', help='simulated cluster latency (ms)', type=int, default=0)
parser.add_argument('-b', '--bootstrap', help='Bootstrap node to use (if any)', default=None)
parser.add_argument('-no4', '--disable-ipv4', help='Enable IPv4', action="store_true")
parser.add_argument('-no6', '--disable-ipv6', help='Enable IPv6', action="store_true")
parser.add_argument('--gets', action='store_true', help='Launches get calls timings benchmark test.', default=0)
args = parser.parse_args()
if args.gets < 1:
print('No test specified... Quitting.', file=sys.stderr)
sys.exit(1)
wb = WorkBench(args.ifname, args.virtual_locs, args.node_num, loss=args.loss,
delay=args.delay, disable_ipv4=args.disable_ipv4,
disable_ipv6=args.disable_ipv6)
wb.create_virtual_net()
bootstrap = wb.get_bootstrap()
bootstrap.resize(1)
print("Launching", wb.node_num, "nodes (", wb.clusters, "clusters of", wb.node_per_loc, "nodes)")
try:
for i in range(wb.clusters):
wb.start_cluster(i)
if args.gets:
getsTimesTest()
except Exception as e:
print(e)
finally:
for p in wb.procs:
if p:
p.send_signal(signal.SIGINT);
bootstrap.resize(0)
wb.destroy_virtual_net()
for p in wb.procs:
if p:
try:
p.wait()
p.release()
except Exception as e:
print(e)